Online PHP editor | refs for gkY3a

<?php $a1 = Array ( '0' => Array ( 'src' => '/wp-content/uploads/2019/09/heythere.jpg', 'source' => 'database' ), '1' => Array ( 'src' => '/wp-content/uploads/2019/09/test.jpg', 'source' => 'database' ) ); $a2 = Array ( '0' => Array ( 'src' => '/wp-content/uploads/2019/09/heythere.jpg', 'source' => 'directory' ), '1' => Array ( 'src' => '/wp-content/uploads/2019/09/demo.jpg', 'source' => 'directory' ), '2' => Array ( 'src' => '/wp-content/uploads/2019/09/image.jpg', 'source' => 'directory' ) ); $u = array_values(array_column(array_merge($a1,$a2), null, 'src')); print_r($u);